Double-pole snap-switch



(in) Model.)

H. H.-C'ROWE'LL. DOUBLE POLE SNAP SWITCH.

No.436,122. Patented Sept. 9,1890.

%zwmd IN'VENTDR 44% ATTORNEYS UNITED STATES HowARDI-I. oRoWELL, on SYRACUSE, NEW YORK.

DOUBLE-POLE SNAP-SWITCH.

srncxrrca'rion forming part a Letters Patent No. 436,122, dated September 9, 1890.

Application filed May 22,1s9o.- Serial No. 352,79'2. (No model.)

To all whom, it may concern.-

Be it known that I, HOWARD H..CRownLL,'

of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Double-Pole Snap- Switches, of which the following, taken in connection with the accompanying drawings, is a full, clear, and. exact description.

My invention relates to snap switches .for making and breakingdouble-pole incandescent circuits. My object is to produce a double-pole switch cheap and durable inconstruction-and of 1 great utility. i a

- My invention consists-in-the several novel features of construction and operation heree inafter 'des'cribed,and specifically set forth v in the claims annexed.

- It is constructed as follows, reference being.

had t t he accompanying'drawings, in which Flgure 1 is a top plan view of the switch with the upper casing removed. Fig. 2 is a top view of the brushes secured to either end' of a non-conducting. cross bar or arm. Fig. 3 is a side View of. the switch complete with the upper casing removed. Fig. 4 is a sectional elevation through the switch and crossbar.

Fig. 5 isa sectional detail of the lower end of thespindle. Fig. 6 is a top plan viewof one side of the base and inclines, showing an insulated-beading extendi-ng up between the contact-plates.

A is the base, of circular form, constructed substantially as shown and having a series of inclines 1'1 1 1, and preferably circularly, around the shankor spindle 0. Upon the alternate faces of the inclines are secured contact-plates 2 and3', insulated from each other by the headings, or they may be insulated simply. by a space.

, The'contact-plate 2 has an arm extending overthe side of the base and provided With an openingthrough which I insert the binding-posts 5,and about which the wire 6,. conveying the current, is secured. The contactplate 3v has an arm extending beneath plate 2, thence 'down the side of the base, and is secured by a binding-post, same as in Plate '2, and to this binding-post a wire-is secured.

The opposite incline is constructed similar to the one just described.

Through the center of the base I make an the lower side of the arm I), as shown in crosssection in Rig. 4. The said flange is rigidly secured to arm D either by inserting screws through the flange into .the -'arm orin any other well-known manner;

12 and Bare the metallic brushes, constructed as shown, withtheir free ends bi-' furcated and gradually bent down=as they outwardly-projecting flange fitting up against approach the end, with a slight upward turn at the extreme end or'point; These brushes are secured to the cross-bar D, which is con structed of wood or other non conducting material.

It.will be observed that when the spindle O is turned from left to right by means of the thumb-piece E, the brushes are caused to travel up the inclines, and when they pass the step .or highest point the tension produced by-the spring 9 forces them down,causing the snap, as required by the insurance regulations, and instantly either making or breaking the electric circuit, according to their position. i I

The alternate inclines not covered by the conducting-plates aresimply constructed with the base of insulating material.

F is anexteriorcover secured over the switch, having an'opening in ts center to What-I c1aiin,'an d desire to secure by Let'- ters Patent, isp 1. A double-pole electric switch consisting of an insulated base provided with a series of inclines upon its upper side, all extending allow the spindle to protrude far enough, and I .upon which is secured'the thumb-piece.

in the same direction, said. inclines being al teinately insulated and alternately provided with conducting-plates secured to. the upper faces of said inclines, binding-posts having wires connected thereto. and: to the saidcon ,ducting-plate's, a vertical spindle having a 'sleeve" inclosing its lower end. and secured loosely in the said base by a pin passing through the spindle and sleeve and extending beyond its edge, a recess for the end of said spindle to travel in, a coil-spring secured about the lower end of said sleeve, and an insulated cross-liar secured to the upper end of the said sleeve and having bifurcated brushes secured to either end, substantially as described, for the purposes set forth.

2. A double pole electric switch consisting of an insulated base provided with a seriesof inclines upon its upper side, all extending in the same direction, said inclines being alternately-insulated and alternately provided with conducting plates, said conductingplates each having an arm secured at its end by a binding-post, the arm of the inner plate extending some distance beneath the outer Y plate an insulating-bead extending up between the conducting-plates, binding-posts having electric wires connected thereto, a vertical spindle having a sleeve and closing its lower end and secured loosely in said base by a pin passing through the spindle and sleeve and extending beyond its edges, a recess for said pin to travel in, acoil-spring secured about the lower end of said sleeve, and an insulating cross-bar secured to the upper end of said sleeve and having the spindle pass through it and provided with bifurcated brushes secured to either end thereof, said brushes adapted to travel upon the incline, substantially as described, for the purposes set forth.

In witness whereof I have hereunto set my hand this 19th day of May, 1890. i

' HOWARD H. CROWELL.

In presence of- H. P. DENISON, ELLA V. MACK. 

